/**   * 按文件名排序   * @param filePath   */  public static ArrayList<String> orderByName(String filePath) {    ArrayList<String> FileNameList = new ArrayList<String>();    File file = new File(filePath);    File[] files = file.listFiles();    List fileList = Arrays.asList(files);    Collections.sort(fileList, new Comparator<File>() {      @Override      public int compare(File o1, File o2) {        if (o1.isDirectory() && o2.isFile())          return -1;        if (o1.isFile() && o2.isDirectory())          return 1;        return o1.getName().compareTo(o2.getName());      }    });    for (File file1 : files) {      if (file1.isDirectory()) {        FileNameList.add(file1.getName());      }    }    return FileNameList;  }

/**   * 按文件名排序   * @param filePath   */  public static ArrayList<String> orderByName(String filePath) {    ArrayList<String> FileNameList = new ArrayList<String>();    File file = new File(filePath);    File[] files = file.listFiles();    List fileList = Arrays.asList(files);    Collections.sort(fileList, new Comparator<File>() {      @Override      public int compare(File o1, File o2) {        if (o1.isDirectory() && o2.isFile())          return -1;        if (o1.isFile() && o2.isDirectory())          return 1;        return o1.getName().compareTo(o2.getName());      }    });    for (File file1 : files) {      if (file1.isDirectory()) {        FileNameList.add(file1.getName());      }    }    return FileNameList;  }

/**   * 按文件修改時間排序   * @param filePath   */  public static ArrayList<String> orderByDate(String filePath) {    ArrayList<String> FileNameList = new ArrayList<String>();    File file = new File(filePath);    File[] files = file.listFiles();    Arrays.sort(files, new Comparator<File>() {      public int compare(File f1, File f2) {        long diff = f1.lastModified() - f2.lastModified();        if (diff > 0)          return 1;        else if (diff == 0)          return 0;        else          return -1;// 如果 if 中修改為 返回-1 同時此處修改為返回 1 排序就會是遞減      }      public boolean equals(Object obj) {        return true;      }    });    for (File file1 : files) {      if (file1.isDirectory()) {        FileNameList.add(file1.getName());      }    }    return FileNameList;  }

/**   * 按文件大小排序   * @param filePath   */  public static ArrayList<String> orderBySize(String filePath) {    ArrayList<String> FileNameList = new ArrayList<String>();    File file = new File(filePath);    File[] files = file.listFiles();    List<File> fileList = Arrays.asList(files);    Collections.sort(fileList, new Comparator<File>() {      public int compare(File f1, File f2) {        long s1 = getFolderSize(f1);        long s2 = getFolderSize(f2);        long diff = s1 - s2;        if (diff > 0)          return 1;        else if (diff == 0)          return 0;        else          return -1;// 如果 if 中修改為 返回-1 同時此處修改為返回 1 排序就會是遞減      }      public boolean equals(Object obj) {        return true;      }    });    for (File file1 : files) {      if (file1.isDirectory()) {        FileNameList.add(file1.getName());      }    }    return FileNameList;  }  /**   * 獲取文件夾大小   * @param file File實例   * @return long   */  public static long getFolderSize(File file) {    long size = 0;    try {      java.io.File[] fileList = file.listFiles();      for (int i = 0; i < fileList.length; i++) {        if (fileList[i].isDirectory()) {          size = size + getFolderSize(fileList[i]);        } else {          size = size + fileList[i].length();        }      }    } catch (Exception e) {      e.printStackTrace();    }    return size;  }